Ok I went to the audio place yesterday to get a quote to hook up 2 amps & my sub box, they quoted me $450!!!that sounds like bullshit, so anyway, I had just pulled all the amps & the box out of my old POS & it was all already hooked up, I looked at the wires & i found the two that go to the subs & the two that go to my front speakers, now the confusing thing is my crossover has two rca plugs that say input, Im assuming that this runs from my head unit. Am I missing something? do most head units have two rca jacks I can just plug into & thats it?? do I need an adapter for my oem head unit or would it be easier to buy an aftermarket one & kit & just plug it in. Maybe Im retarded & looking at this wrong